| 摘要 |
a helical gear moving in gear with a worm gear connected to the top end of a motor shaft so as to transmit the driving force of a motor; horizontal and vertical bevel gears getting in gear with each other and associated with the helical gear and mutual shafts; driving means including a driving wheel and the bevel gears in the state of being fixed to both ends of an axle shaft provided through the center of the vertical bevel gear, a shaft inserting space in the upper center thereof, wherein the shaft inserting space has a cylindrical gear of a predetermined height in the circumference thereof, and a cylindrical housing having an axle shaft inserting space in the bottom thereof; a handle; a seat; and a controlling means for producing a melody during a driving and controlling the speed of the motor. |
